Lug strap or pick-arm strap for looms



Dec. 21 192s. 1,611,512

H. E. WILSON I LUG STRAP 0R PICK ARM STRAP FOR LOOKS Filed Jan. 8. 1926I Im/entor.

HerberT E. Wilson Patented Dec. 21, 1926.

UNITED srs HERBERT E. WILSON, OF ANTR-IIJI, NEW HAMESI'IIRE.

LUG STRAP 0R PICK-ARM STRAP FOR LOOMS.

Application filed January 8, 1926. .Serial No. 79.97%.

This invention relates to lug straps or pick arm strap for looms an hasfor its ob ject to provide a novel pick arm strap in which the-plug inthe bend or bight of the U-shaped body is so constructed as to giveincreased length of service over the plugs which are commonly employed.In one "familiar form of lug strap the plug is made entirely of fabric,a strip of fabric being rolled up to form a roll and then subjected totheaction of dies to give it a shape to lit the bend of the body portionand also to give the wear face thereof a concave curvature, said plugbeing suitably anchored in the body by means of a rivet.

While the all-fabric plug has the requisite hardness and density to makeit acceptable for use in a lug strap or pick arm strap, yet it has thedisadvantage that the fabric does not withstand the wear to which theplug is subjected in the operation of the loom, and as a result the faceof an all-fab ric plug which engages the shackle of the pick arm soonwears down to a point where the anchoring rivet is exposed, thusrendering the pick arm strap unfit for further use.

In an effort to increase the length of life of the plug I have developedthe present invention in which the plug'of the pick arm strap is made upof alternate layers of fabric and leather. The presence of the fabric inthe plug gives it the requisite hardness or density and the presence ofthe leather introduces a wear-resisting element which will resist thewear to which theplug is subjected to a much greater degree than fabricand thereby increase the length of life of the plug.

In order to give an understanding of the invention I have illustrated inthe drawings a selected embodiment thereof which will now be describedafter which the novel features will be pointed out in the appendedclaims.

In the drawings, Fig. l is a perspective view of a lug strap or pick armstrap embodying my invention;

Fig. 2 illustrates how the plug is formed;

Fig. 3 is a sectional view on substantially the section 33, Fig. 1.

In the drawings 1 indicates the usual U shaped body of the lug strap orpick arm strap which is made of layers of fabric compacted together inthe usual way. Situated within the bend or bight of the body is theusual plug 2, said plug havingan exterior face 3 to fit the. curvatureof the inner face of the body 1 and having a concave wear face i whichengages the shackle of the pick arm. The plug is anchored in the bodymember by means of the rivet 5 which extends transversely through theplug and body member as usual.

The part of the lug strap or pick arm strap which first wears out isusually the plug. It is a desideratum that the plug should be relativelyhard and non-yielding and it has been found that a plug made of layersof fabric compacted firmly together has the desired strength andhardness butsuch a plug has only inadequate wearing qualities and willsoon become so worn on the wear face as to expose the anchoring rivet.

In order to'provide a plug which has the requisite strength and rigidityto meet the requirements of use and which has also superior wearingqualities I have produced a plug which is made of alternate layers offabric and leather compacted firmly together. The presence of the fabricin the plug gives it the strength and rigidity required and the presenceof the leather adds the desirable wearing qualities.

One way of making my improved plug is to take a strip of fabric 6 andanother strip of leather 7 and unite them adhesively and roll. them intoa roll as indicated at 8. This rollis then subjected to the action ofdies which subjects it to high pressure and firmly compacts the materialand also gives it the desired shape with the convex exterior face 3 tofit the bend of the pick arm strap and the concave wear face 4:. A plughaving this construction presents alternate layers of fabric and leatherwhich are firmly compacted together and in making the plug I willpreferably make the exterior layer of leather so that the wear face 4 ofthe plug is a leather face. The plug when thus made is anchored in thepick arm strap body by means of the rivet 5 as usual.

The wearing qualities of leather in an article which is subjected to thekind of wear to which a pick'armstrap is subjected is greatly superiorto that of fabric, but leather of itself has too much give or resilienceto make a successful plug for a pick arm strap. By combining the leatherwith the fabric, however, a plug having suflicient strength and rigidityis provided while at g; renew:-

the Seine time there is sufiicient leather in the plug to give theadditional Wearing qualities and consequently a longer life.

iVhen the pick arm strap is in use the. leather Wear surface will glazeover and produce a surface which will last a long time. lVhen, however,the outside layer of leather on the near surface finally Wears throughto expose the layer of canvas and the labr'e layer then Wears through, asecond layer of leather will be exposed Which will give another longterm of service before it is linally Worn through. With thisconstruction, therefore, several layers of leather are provided whichmust be Worn through before the plug is Worn to such an extent that thepick arm strap must be discarded.

A pick arm strap embodying this invention can be made substantially ascheap as a pick arm strap with an all-fabric plug and it not only hasall the advantages or the. pick arin strap with the fabric plug,

but italso has tl added advantage l. A pick arin strap comprising a Ushaped body member and a plug anchored in the bend of the body member,said plug being formed of a large number of relatively thin layers offabric and leather arranged alternately, the layers on the portion ofthe plug exposed to the Wear of the picker stick ly substantiallyparallel to the wear lace.

it pick arrn strap comprising a U- shaped body member and plug anchoredhave signed my HERBEPT E. -\"VILSON.

